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The PARKER PT-00387 is a stainless steel flared tube sleeve designed to create a leak-resistant connection in high-pressure or corrosion-sensitive fluid and gas line assemblies. It features a 37-degree flare angle end connection and is sized for 3/8 inch tube outside diameter. The stainless steel construction makes it suitable for applications where moisture exposure, chemical contact, or elevated temperatures would degrade a standard brass or steel fitting. HVAC technicians, plumbers, and refrigeration mechanics install this sleeve as part of a flared joint assembly to reinforce tubing and maintain consistent flare geometry during tightening.
This sleeve is used in residential and light commercial HVAC refrigerant lines, hydraulic systems, fuel lines, and compressed air or gas distribution where 37-degree flare fittings are specified. It pairs with a standard 37-degree flare nut to secure copper or stainless tubing at a fitting body. The 3/8 inch OD sizing is common in refrigerant suction and liquid line runs, as well as hydraulic and pneumatic circuits requiring a JIC-style flare connection. This SKU is sold as a package quantity of 2 sleeves per order.
Designed as an OEM-style replacement or service component for fluid and gas line assemblies using 37-degree flare fittings with 3/8 inch OD tubing.
Installation is performed by licensed HVAC technicians, plumbers, or hydraulic system mechanics. Depressurize and evacuate any line before disassembly. The sleeve is positioned on the tubing before the flare is formed; it cannot be added after flaring is complete. Follow applicable system codes and the fitting manufacturer torque guidance for the mating flare nut to avoid over-tightening and distorting the flare seat.
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